QS7779PM Datasheet, PDF (1/11 Pages) Nippon Precision Circuits Inc – 3D Stereo Enhancement and 3D Virtual Stereo Surround with Dolby Pro Logic and Mixed DVD (AC-3) Decoder

NIPPON PRECISION CIRCUITS INC.
QS7779PM/CM
3D Stereo Enhancement and 3D Virtual Stereo Surround
with Dolby Pro Logic and Mixed DVD (AC-3) Decoder
OVERVIEW
The QS7779PM/CM is an audio processor IC which
implements a decoder for stereo matrix encoded
source materials such as the Dolby Surround Pro
Logic and mixed DVD (AC−3) with surround virtu-
alization using QSound™ technology developed and
licensed by QSound Labs, Inc. This chip produces
enhanced stereo sound for a stereo input signal and if
the input signal contains matrix encoded surround
sound, the chip decodes it and produces 3D virtual-
ized surround sounds with two speakers.
FEATURES
s Capable of decoding Dolby Surround materials
such as Dolby Pro Logic or other matrix surround
encoded materials (DVD/AC−3)
s Virtualized surround sound with two speakers
s 3D stereo sound enhancement
s Two enhanced levels
s Parallel and serial digital interface for mode con-
trol
• QS7779CM for I²C 2 control pins serial inter-
face (Data, Clock)
• QS7779PM for three-wire serial interface
(Data, Clock and Strobe)
s Supply voltage (analog): 5 to 13V
Supply voltage (digital): 4.5 to 5.5V
s 24-pin SSOP packaging
APPLICATIONS
s DVD, Laser disk player
s Audio systems including TV, Radio and VCR
s Computer-based multimedia products, including
sound cards and powered loudspeakers
PINOUT(Top view)
QS7779PM
QS7779CM
QXAC3 1
QXAC2
QXAC1
RIN
LIN
COUT
CIN
VREFIN
VREFOUT
VREF
GND
SPRD(SCL) 12
24 QXAC4
VCC
QXBC1
QXBC2
QXBC3
QXBC4
ROUT
LOUT
MUTE(STRB)
VDD
P/S
13 BYP(SDA)
QXAC3 1
QXAC2
QXAC1
RIN
LIN
COUT
CIN
VREFIN
VREFOUT
VREF
GND
SPRD(SCL) 12
24 QXAC4
VCC
QXBC1
QXBC2
QXBC3
QXBC4
ROUT
LOUT
MUTE
VDD
P/S
13 BYP(SDA)
Using these products does not require any Dolby certifications.
ORDERING INFORMATION
Device
QS7779PM
QS7779CM
Package
24-pin SSOP
24-pin SSOP
I²C bus is a registered tra d e m a r k of Philips Electronics N.V.
Dolby and the double-D symbol are registered trademarks of Dolby Laboratories Licensing Corporation.
NIPPON PRECISION CIRCUITS—1